Zhao, YY, Frost, RL, Martens, WN, Zhu, HY
The growth of boehmite nanostructures at low temperature using a soft chemistry route with and without (PEO) surfactant is presented. Remarkably long boehmite I D nanotubes/nanofibers were formed...
XRD, TEM and thermal analysis of Fe doped boehmite nanofibres and nanosheets (2007)
Zhao, Y, Frost, RL, Martens, WN, Zhu, HY
Iron doped boehmite nanofibres with varying iron content have been prepared at low temperatures using a hydrothermal treatment in the presence of poly(ethylene oxide) surfactant. The resultant...
Synthesis, characterization, and surface properties of iron-doped boehmite nanofibers (2007)
Zhao, YY, Martens, WN, Bostrom, TE, Zhu, HY, Frost, RL
Iron-doped boehmite nanofibers with varying iron contents have been prepared at low temperatures using hydrothermal treatment in the presence of poly(ethylene oxide) surfactant. The resulting...
Yang, DJ, Xu, Y, Wu, D, Sun, YH, Zhu, HY, Deng, F
Mesoporous silicas with methyl groups anchored on the pore wall by covalent bonds were prepared using polymethylhydrosiloxane and tetraethylorthosilicate as silica sources via a one-step synthesis...
Zhu, HY, Zheng, ZF, Gao, XP, Huang, YN, Yan, ZM, Zou, J, ...
Niobium pentoxide reacts actively with concentrate NaOH solution under hydrothermal conditions at as low as 120 degrees C. The reaction ruptures the corner-sharing of NbO7 decahedra and NbO6...
Han, ZH, Zhu, HY, Shi, J, Lu, GQ
The nanocomposites of general layered clays and metal sulfides could be produced from reactions of the layered clay aqueous suspensions and water-soluble metal-thiourea complexes. The clay could be...
Discoloration and mineralization of Reactive Red HE-3B by heterogeneous photo-Fenton reaction (2003)
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
Discoloration and mineralization of Reactive Red HE-3B were studied by using a laponite clay-based Fe nanocomposite (Fe-Lap-RD) as a heterogeneous catalyst in the presence of H2O2 and UV light. Our...
Zr-Laponite pillared clay-based nickel catalysts for methane reforming with carbon dioxide (2003)
Zr-Laponite pillared clays were prepared and used as supports of nickel catalysts for the methane reforming reaction with carbon dioxide to synthesis gas. The structural and textural characteristics...
Use of anion clay hydrotalcite to remove coloured organics from aqueous solutions (2003)
Anion clay hydrotalcite sorbents were prepared to investigate their adsorption capabilities in the removal of coloured organic substances from various aqueous systems. Anion clay hydrotalcite was...
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
A novel nanocomposite of iron oxide and silicate, prepared through a reaction between a solution of iron salt and a dispersion of Laponite clay, was used as a catalyst for the photoassisted Fenton...
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
A novel laponite RD clay-based Fe nanocomposite (Fe-Lap-RD) has been successfully synthesized through a reaction between a solution of iron salt and an aqueous dispersion of laponite RD clay. The...
gamma-alumina nanofibers prepared from aluminum hydrate with poly(ethylene oxide) surfactant (2002)
Zhu, HY, Riches, JD, Barry, JC
Introducing poly(ethylene oxide) surfactant to aluminum hydrate colloids can effectively direct the crystal growth of boehmite and the crystal morphology of final gamma-alumina crystallites. Fibrous...
Novel composites of TiO2 (anatase) and silicate nanoparticles (2002)
Zhu, HY, Orthman, JA, Li, JY, Zhao, JC, Churchman, GJ, Vansant, EF
Thermally stable composite nanostructures of titanium dioxide (anatase) and silicate nanoparticles were prepared from Laponite clay and a sol of titanium hydrate in the presence of poly(ethylene...
Porous solids from layered clays by combined pillaring and templating approaches (2002)
The pore structure formation in bentonite, pillared with a mixed sol of silicon and titanium hydroxides and treated subsequently with quaternary ammonium surfactants, is investigated. The surfactant...
Molecular engineered porous clays using surfactants (2002)
Zhu, HY, Ding, Z, Lu, CQ, Lu, GQ
Quaternary ammonium surfactants were used to control the pore structure of bentonite intercalated with a mixed hydro-sol of silicon and titanium. Porous clay heterostructures of alumina and laponite...
Ding, Z, Kloprogge, JT, Frost, RL, Lu, GQ, Zhu, HY
Metal oxide pillared clay (PILC) possesses several interesting properties, such as large surface area, high pore volume and tunable pore size (from micropore to mesopore), high thermal stability,...
Alumina intercalated laponite (Al-laponite) was prepared with a polyethylene oxide (PEO) surfactant and used as supports of nickel catalysts for the carbon dioxide reforming reaction with methane to...
Engineering the structures of nanoporous clays with micelles of alkyl polyether surfactants (2001)
Composite clay nanostructures (CCNs) were observed in intercalating Laponite clay with alumina in the presence of alkyl polyether surfactants which contain hydrophobic alkyl chains and ether groups....
A pore-size-dependent equation of state for multilayer adsorption in cylindrical mesopores (1999)
The chemical potential of adsorbed film inside cylindrical mesopores is dependent on the attractive interactions between the adsorbed molecules and adsorbent, the curvature of gas/adsorbed phase...
Various amounts of Na+ ions were exchanged into alumina pillared bentonite (Al-PILB) sample, by controlling the pH of the dispersion of Al-PILB and sodium chloride solution. The Na+ doped pillared...
Photocatalytic properties of titania pillared clays by different drying methods (1999)
Ding, Z, Zhu, HY, Lu, GQ, Greenfield, PF
Photocatalysts based on titania pillared clays (TiO2 PILCs) have been prepared through a sol-gel method. Different drying methods, air drying (AD), air drying after ethanol extraction (EAD), and...
Naturally occurring clays and pillared clays are used as supports of nickel catalysts for the methane reforming reaction with carbon dioxide to synthesis gas. The structural and textural...
Thickness and stability of adsorbed film in cylindrical mesopores (1998)
The adsorbed film in small cylindrical mesopores is studied by using MCM-41 samples of uniform cylindrical channels as model systems. It is found that at a given relative pressure, the smaller the...
Pore structure tailoring of pillared clays with cation doping techniques (1998)
Techniques and mechanism of doping controlled amounts of various cations into pillared clays without causing precipitation or damages to the pillared layered structures are reviewed and discussed....
Pore structure characterisation of pillared clays using a modified MP method (1997)
Zhu, HY, Lu, GQ, Maes, N, Vansant, EF
The data of nitrogen adsorption on pillared clays (PILC) are converted to comparison plots (t-plots) to derive their pore size distribution (PSD). As in the MP method, the surface area of a group of...
Zhao, XS, Lu, GQ, Whittaker, AK, Millar, GJ, Zhu, HY
A comprehensive study was conducted on mesoporous MCM-41. Spectroscopic examinations demonstrated that three types of silanol groups, i.e., single, (SiO)(3)Si-OH, hydrogen-bonded,...
Improved comparison plot method for pore structure characterization of MCM-41 (1996)
Zhu, HY, Zhao, XS, Lu, GQ, Do, DD
MCM-41 samples of various pore dimensions are synthesized. Plotting of nitrogen adsorption data at 77 K versus the statistical film thickness (comparison plot) reveals three distinct stages, with a...
Naturally occurring clays and pillared clays are used as supports of nickel catalysts for the methane reforming reaction with carbon dioxide to synthesis gas. The structural and textural...
Thickness and stability of adsorbed film in cylindrical mesopores
The adsorbed film in small cylindrical mesopores is studied by using MCM-41 samples of uniform cylindrical channels as model systems. It is found that at a given relative pressure, the smaller the...
Pore structure tailoring of pillared clays with cation doping techniques
Techniques and mechanism of doping controlled amounts of various cations into pillared clays without causing precipitation or damages to the pillared layered structures are reviewed and discussed....
Composite adsorbents of carbon and alumina intercalated montmorillonite were prepared and characterized by adsorption of N-2 and O-2 at various temperatures. The effects of pyrolysis, temperature,...
Photocatalytic properties of titania pillared clays by different drying methods
Ding, Z, Zhu, HY, Lu, GQ, Greenfield, PF
Photocatalysts based on titania pillared clays (TiO2 PILCs) have been prepared through a sol-gel method. Different drying methods, air drying (AD), air drying after ethanol extraction (EAD), and...
A pore-size-dependent equation of state for multilayer adsorption in cylindrical mesopores
The chemical potential of adsorbed film inside cylindrical mesopores is dependent on the attractive interactions between the adsorbed molecules and adsorbent, the curvature of gas/adsorbed phase...
Flyash as support for Ni catalysts in carbon dioxide reforming of methane
A series of Ni catalysts supported on flyash treated by various chemical methods was tested for carbon dioxide reforming of methane. Ni catalyst on the flyash treated with CaO (Ni/Ash-CaO) shows high...
Various amounts of Na+ ions were exchanged into alumina pillared bentonite (Al-PILB) sample, by controlling the pH of the dispersion of Al-PILB and sodium chloride solution. The Na+ doped pillared...
Novel composite membranes for gas separation: Preparation and performance
Da Costa, JCD, Lu, GQ, Zhu, HY, Rudolph, V
High performance composite membranes based on molecular sieving silica (MSS) were synthesized using sols containing silicon co-polymers (methyltriethoxysilane and tetraethylorthosilicate). Alpha...
Controlled doping of transition metal cations in alumina pillared clays
A two-step method of loading controlled amounts of transition metal cations into alumina pillared clays (Al-PILCs) is proposed. First, calcined Al-PILC was dispersed into an aqueous solution of...
Engineering the structures of nanoporous clays with micelles of alkyl polyether surfactants
Composite clay nanostructures (CCNs) were observed in intercalating Laponite clay with alumina in the presence of alkyl polyether surfactants which contain hydrophobic alkyl chains and ether groups....
Estimating pore size distribution from the differential curves of comparison plots
Comparison plots, t- or alpha (s)-plot were constructed from the data of nitrogen adsorption on porous solids and on a nonporous reference. The variations in adsorption amount V with respect to t or...
Ding, Z, Zhu, HY, Greenfield, PF, Lu, GQ
Titania sol-pillared clay (TiO2 PILC) and silica-titania sol-pillared clay (SiO2-TiO2 PILC) were synthesized by the sol-gel method. Supercritical drying (SCD) and treatment with quaternary ammonium...
Alumina intercalated laponite (Al-laponite) was prepared with a polyethylene oxide (PEO) surfactant and used as supports of nickel catalysts for the carbon dioxide reforming reaction with methane to...
Ding, Z, Kloprogge, JT, Frost, RL, Lu, GQ, Zhu, HY
Metal oxide pillared clay (PILC) possesses several interesting properties, such as large surface area, high pore volume and tunable pore size (from micropore to mesopore), high thermal stability,...
Molecular engineered porous clays using surfactants
Zhu, HY, Ding, Z, Lu, CQ, Lu, GQ
Quaternary ammonium surfactants were used to control the pore structure of bentonite intercalated with a mixed hydro-sol of silicon and titanium. Porous clay heterostructures of alumina and laponite...
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
A novel laponite RD clay-based Fe nanocomposite (Fe-Lap-RD) has been successfully synthesized through a reaction between a solution of iron salt and an aqueous dispersion of laponite RD clay. The...
Zr-Laponite pillared clay-based nickel catalysts for methane reforming with carbon dioxide
Zr-Laponite pillared clays were prepared and used as supports of nickel catalysts for the methane reforming reaction with carbon dioxide to synthesis gas. The structural and textural characteristics...
Use of anion clay hydrotalcite to remove coloured organics from aqueous solutions
Anion clay hydrotalcite sorbents were prepared to investigate their adsorption capabilities in the removal of coloured organic substances from various aqueous systems. Anion clay hydrotalcite was...
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
A novel nanocomposite of iron oxide and silicate, prepared through a reaction between a solution of iron salt and a dispersion of Laponite clay, was used as a catalyst for the photoassisted Fenton...
Discoloration and mineralization of Reactive Red HE-3B by heterogeneous photo-Fenton reaction
Feng, JY, Hu, XJ, Yue, PL, Zhu, HY, Lu, GQ
Discoloration and mineralization of Reactive Red HE-3B were studied by using a laponite clay-based Fe nanocomposite (Fe-Lap-RD) as a heterogeneous catalyst in the presence of H2O2 and UV light. Our...
Zhu, ZH, Zhu, HY, Wang, SB, Lu, GQ
A series of mesoporous Al2O3 samples with different porous structures and phases were prepared and used as supports for Cu/Al2O3 catalysts. These catalysts were characterized by N-2 adsorption, NMR,...
Han, ZH, Zhu, HY, Shi, J, Lu, GQ
The nanocomposites of general layered clays and metal sulfides could be produced from reactions of the layered clay aqueous suspensions and water-soluble metal-thiourea complexes. The clay could be...
Improved comparison plot method for pore structure characterization of MCM-41
Zhu, HY, Zhao, XS, Lu, GQ, Do, DD
MCM-41 samples of various pore dimensions are synthesized. Plotting of nitrogen adsorption data at 77 K versus the statistical film thickness (comparison plot) reveals three distinct stages, with a...
Pore structure characterisation of pillared clays using a modified MP method
Zhu, HY, Lu, GQ, Maes, N, Vansant, EF
The data of nitrogen adsorption on pillared clays (PILC) are converted to comparison plots (t-plots) to derive their pore size distribution (PSD). As in the MP method, the surface area of a group of...
Zhao, XS, Lu, GQ, Whittaker, AK, Millar, GJ, Zhu, HY
A comprehensive study was conducted on mesoporous MCM-41. Spectroscopic examinations demonstrated that three types of silanol groups, i.e., single, (SiO)(3)Si-OH, hydrogen-bonded,...